The 2021 ASHRAE HandbookFundamentals covers basic principles and data used in the HVAC&R industry. The calculation of climatic design conditions in the 2005 ASHRAE HandbookFundamentals. 2015. 2013. b. The methodologies provide a protocol for using state-of-the-art mesoscale modeling techniques to derive meteorological conditions specific to the study area. Bell, R. Leeper, D. Easterling, J. Lawrimore, T. Meyers, M. Helfert, G. Goodge, and P. Thorne. While a virtual environment cannot completely fill the void of in-person connections, attendees can still connect with conference sponsors directly and live in the virtual conference environment. Shaping Tomorrow's Built Environment Today, ----------------------------------------------------------- -------------------------------------------------------------------------------------, Click on the topics below for more information, Officers, Directors, Councils, Committees, Staff, Science and Technology for the Built Environment, Instructor-Led Training Seminar and Short Courses, Self-Directed Learning / Group Learning Texts, Criteria for Annual Conference City Selection. Do I have to be registered for the Virtual Conference to attend the live sessions, special events and meet-ups? Wind data for design of smoke control systems. The underlying data also depend on the method of observation. This means we now have design conditions in new locations such as Lagos, Nigeria, which is home to 21 million people. Annual Heating and Humidification Design Conditions 99.6% 99% DP HR MCDB DP HR MCDB WS MCDB WS MCDB MCWS PCWD 2 3a3b4a4b 4c 4d4e 4f 5a5b 5c 5d6a6b 1 27.7 31.5 14.7 11.6 37.3 19.7 14.8 39.4 22.3 53.8 19.9 55.8 6.1 0 Annual Cooling, Dehumidification, and Enthalpy Design Conditions DB MCWB DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB MCWS PCWD Please contact meetings@ashrae.org with additional questions. To calculate hourly temperatures, subtract the Table 6 fraction of the dry- or wet-bulb daily range from the dry- or wet-bulb design temperature (limiting by saturation in the case of the wet-bulb). This service is also available via gis.ncdc.noaa.gov/map/viewer. Sequences of extreme temperature and humidity for design calculations (RP-828). Total yearly hours: 8,760 hours. To the degree that the differences used to calculate the standard deviations are distributed normally, the short-period design temperatures can be expected to lie within one standard deviation of the long-term design temperature 68% of the time. Gates, T.F. 2013. Lott, J.N. Display the table of years and months used for the calculation. WDView 6.0 gives users full access to the frequency tables and joint frequency matrices for all 8118 stations in the 2017 ASHRAE HandbookFundamentals via a spreadsheet, and provides the following capabilities: Select a station by WMO number or region/country/state/name or by proximity to a given latitude and longitude. The solar radiation data are derived from satellite data, and the environmental data are downscaled from the MERRA reanalysis data set derived from a large climate forecasting model (Rienecker et al. Table of Contents2021 ASHRAE HandbookFundamentals. Design conditions for BATON ROUGE, LA, USA Aug Sep Oct Nov Dec % Jul Sep Oct Apr May % Jan Jul Nov Apr n=5 years May Jun n=10 years n=20 years Extreme Max WB Hottest month 1% Extreme Annual DB Mean Dehumidification DP/MCDB and HR 0.4% 1% Extreme Annual WS Hottest month DB range Dec % Jan Feb Mar Feb Mar % Aug Jun 2% 0.4% Evaporation WB/MCDB 0.4 . Estimation and extrapolation of climate normals and climatic trends. Table9Locations Representing Various Climate Types. Stephenson, D.G. It does not present official positions of the Society nor reflect Society policy. Environment Canada. Lamming, S.D., and J.R. Salmon. Presenting Sponsors include: The 2021 Virtual Annual Conferences Meeting of the Members includes an update on the State of the Society by ASHRAE President, Chuck Gulledge and the Secretarys Report from ASHRAE Executive Vice President, Jeff Littleton, including an overview of the proposed bylaws amendment. This track will also address reducing consumption of energy & water and compare how crop types and animal species impact HVAC analysis and design. Corrections for this volume will be listed in subsequent volumes and on the ASHRAE website. visit the ASHRAE home page at, ASHRAE Chapter 20, Space Air Diffusion: terminology updates, Chapter 23, Insulation for Mechanical Systems: new discussion of insulation system moisture resistance, Chapter 24, Airflow Around Buildings: new equation for wind-induced pressure difference between indoor and outdoor environments, Chapter 31, Physical Properties of Secondary Coolants (Brines): expanded discussion on service considerations, Chapter 34, Energy Resources: updated figures and discussion of energy resources to reflect recent consumption figures, Chapter 35, Sustainability: new discussion of commissioning, Chapter 38, Measurement and Instruments: new coverage of resistance sensors and vortex shedding in airflow measurement. Methuen, London. Burkes, and H. Zhang. standard deviation of annual extreme maximum or minimum dry-bulb temperatures, 1 if maximum dry-bulb temperatures are being considered, 1 if minimum dry-bulb temperatures are being considered, longitude of local standard time meridian, E of Greenwich (negative in western hemisphere), beam normal irradiance (measured perpendicularly to rays of the sun), diffuse horizontal irradiance (measured on horizontal surface). Burkes, and H. Zhang. Are you missing the business connections made at a face-to-face conference? Hubbard, K., K. Kunkel, A. DeGaetano, and K. Redmond. Standard 15927-6. International Organization for Standardization, Geneva. Files for 75 locations are now available. Just right click. 2007. Live sessions aired on Monday, June 28and endedon Wednesday, June 30. The integrated surface database: Recent developments and partnerships. 2009 ASHRAE Handbook - Foundamentals (SI) RAMSAR, IRAN, ISLAMIC REPUBLIC OF (WMO: 722683) Lat:36.90N. Sessions addressing the latest information relating to the COVID-19 pandemic, as well as eight other tracks. National Climatic Data Center, National Oceanic and Atmospheric Administration, Asheville, NC. With that goal in mind, the tables also provide two parameters (monthly average temperature T, and standard deviation of daily average temperature sd) that enable estimation of degree-days to any base with reasonable accuracy. Many data sets in different record formats have been developed to meet this requirement. Temperature trends for locations listed in the tables of climatic design conditions in the 2013 ASHRAE HandbookFundamentals. ams.confex.com/ams/pdfpapers/71929.pdf. Roth, M. 2017. REST2: High performance solar radiation model for cloudless-sky irradiance, illuminance and photosynthetically active radiationValidation with a benchmark dataset. A comparison of methods of fitting the double exponential distribution. In, Data documentation for data set 3505 (DSI-3505) integrated surface hourly (ISH) data, Thevenard, D., and R. Humphries. Researchers are invited to present papers, extended abstracts, seminars, forums or participate in panel discussions. Revised optical air mass tables and approximation formula. ANSI/ASHRAE, NCDC. NCDC. 2011. ANSI/ASHRAE Standard 169-2013. The statistics include means, medians (precipitation and snow elements), extremes, mean number of days exceeding threshold values, and heating, cooling, and growing degree-days for various temperature bases. 2008. Note that f(Zb) = f(Zb) and F(Zb) = 1 F(Zb), hence. Energy and Buildings 38(8):972-980. 2013. NCDC. Geographically, increases in average dry-bulb temperature were most visible throughout Europe, in China and southeast Asia, the eastern United States, and southern Australia, and are typically in the range of 0.36 to 1.08F per decade. ASHRAE Research Project, Final Report. 2014. Design values reflect an estimate of the cumulative frequency of occurrence of the weather conditions at the recording station, either for single or jointly occurring elements, for several years into the future. The 2021 update to the "Climatic Design Information" chapter of the ASHRAE HandbookFundamentals includes climate data from more than 1,100 more climate stations than the 2017 chapter. Rienecker, M.M., et al. A table providing the joint frequency of dry-bulb temperature and wet-bulb temperature depression is provided for the locations with hourly observations. ASHRAE winter design conditions are based on the following: a. Other highlights of the updates include the following: Members who receive the Handbook PDF can download a special revision supplement containing just these updated chapters from technologyportal.ashrae.org, along with PDFs of the entire I-P and SI volumes and individual chapters. Regardless of the reasons for increases, the general approach of developing design conditions based on analysis of the recent record (25 years, in this case) was specifically adopted for updating the values in this chapter as a balance between accounting for long-term trends and the sampling variation caused by year-to-year variation. Table 8 shows results of this procedure for all 24 h. The tables of climatic design conditions in this chapter list heating and cooling degree-days (bases 50 and 65F). The grid spacing for this source of data is about 2.5 miles, and currently covers North America up to 50 N, as well as a part of South America down to 10 S. Various types of TMY data are available there, currently for the period 1998 to 2014, as well as each historical year within that time period, with anticipated annual updates. Data documentation for data set 3505 (DSI-3505) integrated surface hourly (ISH) data. 2021 ASHRAE Handbook Fundamentals (I P) . ASHRAE Transactions 111(1):457-466. ASHRAE. The American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) puts out updated design-day or what they call Climatic Design Conditions every four years in the Fundamentals Handbook. ASHRAE. Colliver, D.G., R.S. Journal of Applied Meteorology and Climatology 46: 1759-1776. 1996. 5. 1965. 2007. 2014. Why is the updated climatic data important? The uncertainty for the cold season is higher than for the warm season. Thevenard, D., and K. Haddad. TC 4.2 identifies, researches, analyzes, and disseminates climatic data for design of sustainable built environments. Annual Heating and Humidification Design Conditions 99.6% 99% DP HR MCDB DP HR MCDB WS MCDB WS MCDB MCWS PCWD 2 3a3b4a4b 4c 4d4e 4f 5a5b 5c 5d6a6b 1 19.9 25.0 7.2 8.1 25.9 12.0 10.4 29.9 29.8 45.0 27.0 46.1 13.0 0 Annual Cooling, Dehumidification, and Enthalpy Design Conditions DB MCWB DB MCWB DB MCWB WB MCDB WB MCDB WB MCDB MCWS PCWD The quality control of the integrated surface hourly database. Calculate hourly temperatures for Atlanta, GA, for a July dry-bulb design day using the 5% design conditions. Sessions scheduled at 7:00 a.m. EDT are prefect for attendees joining live from the Middle East, Europe and Africa. International Panel on Climate Change, World Meteorological Organization, Geneva. ASHRAE research project RP-1171 (Hubbard et al. Validation of reactive gases and aerosols in the MACC global analysis and forecast system. Dedicated time in the conference schedule has been allotted for attendees to engage with sponsors. 2004) investigated the uncertainty associated with the climatic design conditions in the 2001 ASHRAE Handbook. www.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-spm.pdf. 2004. As reported by Hubbard et al. The 8th annual research summit invites researchers to share those results, including ASHRAE-sponsored research and research of interest to the ASHRAE community. Oke, T.R. NREL. The Climatography of the United States No. The results for the five annual percentiles are summarized in Figures 4A to 4E, each of which shows how the uncertainty (the average standard deviation for each of the locations in each climate type) varies with length of period. 2002. Annual extreme values represent maximum winter design conditions. In Climatography of the United States #81. Tip: Copy and Paste Your Upcoming Meeting Information in this area. Starting on Monday, June 28, dedicated time has been established to allow for live interaction between attendees and conference sponsors. 2015. Papers and programs in this track will focus on the development of new systems and equipment, improvements to existing systems and equipment and the proper application and operation of systems and equipment. Canadian 1971-2000 climate normals. Although this does not necessarily provide the optimum predictive value for representing conditions over the next one or two decades, it at least has the effect of incorporating changes in climate and local conditions as they occur, as updates are conducted regularly using recent data. Do I have to be registered for the Virtual Annual Conference to attend a committee meeting? Key components of ASHRAE fundamentals include thermodynamics, psychometrics, fluid and mass flow. 2016. 2011. For example, from Figure 4A, the uncertainty for the cold snow forest for a 1-year period is 6.5F. ASHRAE Research Project. Weather data for building design standards. Check the Schedule at a Glance section for more information on scheduled sessions. Plantico, M. 2001. The main objectives were to determine how many years are needed to calculate reliable design values and to look at the frequency and duration of episodes exceeding the design values. NCDC. Colliver, D.G., R.S. 2008. Monthly station climate summaries. On the other hand, ASOS measurements of sky coverage and ceiling height differ markedly from manual observations and are incompatible with solar radiation models used in energy simulation software. 2002. ISO. ? Belcher, B.N., and A.T. DeGaetano. 1989. Lowery, M.D., and J.E. ft2. Hubbard, K., K. Kunkel, A. DeGaetano, and K. Redmond. ASHRAE members can access ASHRAE Journal articles and ASHRAE research project final reports at technologyportal.ashrae.org. COVID-19 may have caused cancellations on in-person meetings but COVID cannot overshadow the many achievements of ASHRAE members! Threlkeld, J.L. Elev:-20. Apparent solar time (AST) for hour 1 local daylight saving time (LDT) is 0.73. Monthly average clear-sky broadband irradiance database for worldwide solar heat gain and building cooling load calculations. Plant and Animal Environments: What Makes Them So Unique? World Meteorological Organization, Geneva. Climate impact on agriculture. 1994. The database of over 20,000 stations contains hourly and some daily summary data from as early as 1900 (many stations beginning in the 19481973 timeframe), is operationally updated each day with the latest available data, and is now being further integrated with various data sets from the United States and other countries to further expand the spatial and temporal coverage of the data. Thevenard, D., J. Lundgren, and R. Humphries. 2007. GPCC. NCDC. Bulletin of the American Meteorological Society 92(6):704. Cooling degree days CDDb to base Tb are calculated by the same equation: Alternative Equations. Monthly normals of temperature, precipitation, and heating and cooling degree-days. Career Development hosted by Certification Committee, Standards Roundtable: Why Standards Matter - and other mysteries of the Universe Explained without consensus, Communications Meet Up: How to Communicate in a Virtual World, bEQ Roundtable: Enhancing Building EQ As Designed Rating with Standard 90.1. (CD-ROM). ASHRAE Research Project. ftp.dwd.de/pub/data/gpcc/html/fulldata_v7_doi_download.aspx. Journal of Climate 24:3624-3648. journals.ametsoc.org/doi/full/10.1175/JCLI-D-11-00015.1. Generation of hourly design-day weather data (RP-1363). Lott, J.N., R. Baldwin, and P. Jones. Crawley Consulting, Washington, D.C. Diamond, H., T. Karl, M. Palecki, C. Baker, J. Users manual for TMY3 data sets. Contact meetings@ashrae.org if you have questions related to Company Packages and pricing. The 2021 Virtual Annual Conference will begin on Monday, June 28 at 12:00 PM EDT, and will end on Wednesday, June 30 at 6:00 PM. In TC 4.2, we typically turn this question back on the designers. 1998. Climate Reference Network after one decade of operations: Status and assessment. Gates, H. Zhang, and K.T. 1990. Global historical climatology networkDaily. Because daily temperature variation is driven by heat from the sun, the profile in Table 6 is, strictly speaking, specified in terms of solar time. New weather data for energy calculations. Colliver, D.G. See the Schedule-at-a-Glance at the top of the page for more details on dedicated time with sponsors. Monthly normals of temperature, precipitation, and heating and cooling degree-days. GPCC Full Data Reanalysis Version 7. This CD is available from NCDC: www.ncdc.noaa.gov/nespls/olstore.prodspecific?prodnum=5005. 2011. The Research Summit includes a partnership with ASHRAE's archival journal, Science and Technology for the Built Environment. Example 9. Any extensive out-of-sequence updates in future will be posted to ASHRAE Handbook Online as a supplemental feature. Reader comments are welcomed. Master List of Commercial Resources. Climatic data for building design standards. Extend your industry branding by becoming a conference sponsor and reach conference attendees and their high interest in new products, technology and technical information. From ASHRAE Journal Newsletter, Jan. 12, 2021. Calculate heating and cooling degree-days to any base, using the method of Schoenau and Kehrig (1990). In Climatography of the United States #81. Updating the ASHRAE climatic data for design and standards (RP-1453). 1996. International station meteorological climate summary (ISMCS). Stephenson, D.G. Energy and Buildings 14:299-302. Technical Document 1377. Stations were grouped in 55 cells covering the globe. 3. Accompanying information allows the user to go back to the source data and obtain sequences with different characteristics (e.g., different probability of occurrence, windy conditions, low or high solar radiation). In Climatography of the U.S. #20. Belcher, B.N., and A.T. DeGaetano. 2011. With more than 50,000 members from over 130+ nations, ASHRAE is a diverse organization dedicated to advancing the arts and sciences of heating, ventilation, air conditioning and refrigeration to serve humanity and promote a sustainable world. The temperatures corresponding to the same percentiles for each contiguous subperiod ranging from 1 to 33 years in length was calculated, and the standard deviation of the differences between the resulting design temperature from each subperiod and the entire 33-year period was calculated. Lowery, M.D., and J.E. Weather data for building design standards. Did you miss it? The calculation method was established by Schoenau and Kehrig (1990). Whether it is unit conversions, equipment failing when too hot or too cold, missing data or stations that aren't where the stations think they are, the list is endless. The preparation of this chapter is assigned to TC 4.2, Climatic Information. 2004. on site on the map and get nearest weather stations! Rienecker, M.M., et al. Many national climate services and other climate data sources are making more information available over the Internet. The map of all 9,237 sites for which climatic design information is available is available through the following link: https://xp20.ashrae.org/StationFinder/StationFinder.htm, 2022 This website describes the activities of the ASHRAE Technical Committee 4.2, Climatic Information. Atmospheric Environment Service, Downsview, Ontario. 2005. Although these results are consistent with general warming of the world climate system, there are other effects that undoubtedly contribute, such as increased urbanization around many of the observing sites (airports, typically). Solution: From Table 1, the July 5% dry-bulb design conditions for Atlanta are DB = 91.6F and MCWB = 74.3F. Livezey, R.E., K.Y. National Climatic Data Center, Asheville, NC. 1987. Corrections to the 2018, 2019, and 2020 Handbook volumes can be found on the ASHRAE website at www.ashrae.org and in the Additions and Corrections section of this volume. Sequences of extreme temperature and humidity for design calculations (RP-828). This update sees the development of a web interface into the climatic data for the ASHRAE membership, which allows ASHRAE members to select a weather station via a map and download the design conditions and visualization/analysis toolsall through a few clicks. (CD-ROM). The data represent a typical year with respect to weather-induced energy loads on a building. ASHRAE Transactions 122(2). Access is granted for registered attendees until December 2022! We recognize that the single greatest strength of our organization is its membership. Weather data viewer, version 6.0. Development of the GEOS-5 atmospheric general circulation model: Evolution from MERRA to MERRA2. Iqbal, M. 1983. Retrieve design climatic conditions for a specified station, in SI or I-P units. Considerable information about weather and climate services and data sets is available elsewhere online. The virtual conference environment is still OPEN! A previous version of the NSRDB required a modified solar radiation model because of the implementation of automated observing systems that do not report traditional cloud elements. This is discussed further in the section on Effects of Climate Change. 1987. Sources of uncertainty in the calculation of the design weather conditions in the. "Our world has experienced fundamental change in the wake of the global COVID-19 pandemic. The ASOS-based model was found less accurate than models based on manually observed data when compared to measured solar radiation. For the criteria corresponding to low values, annual percentiles of 99.6, 99.0, and 98.0 are reported. This track is designed to allow those professionals an opportunity to develop in the areas of presentation skills, leadership, team-building, understanding various business operations, interpersonal skills, etc. Global historical climatology networkDaily. Of these cells, 44% showed an increase in average dry-bulb temperature, and 2% showed a decrease; 26% showed an increase in average dew-point temperature and 10% a decrease; finally, 34% showed an increase in average wet-bulb temperature, and 5% showed a decrease. ASHRAEs International Weather for Energy Calculations (IWEC2) data set (Huang et al. Recording of the Meeting of the Members providing updates from Society leaders and 20212022 ASHRAE President Mick Schwedlers Society Address. 2011). This procedure is applicable to annual or monthly data and is shown in Example 9. Ask to join the TC 4.2 Google Group by sending a request to the webmaster. Therefore, judgment must always be used in assessing the representativeness of the design conditions. ASHRAE Research Project. The integrated surface database: Recent developments and partnerships. Please check for the data in Chapter 14 of the Handbook - Fundamentals, and in the new online Weather Data Viewer, available at weather.ashrae.org. During the 1990s, most data gathering in the United States and Canada was converted to automated systems designated either an automated surface observation system (ASOS) or an automated weather observing system (AWOS). Livezey et al. Integration of ASOS weather data into building energy calculations with emphasis on model-derived solar radiation (RP-1226). Vinnikov, M.M. 2002. This edition of the ASHRAE Pocket Guide, which was first published in 1987, was compiled by ASHRAE staff editors; previous major contributors were Carl W . F14 -- Climatic Design Information (SI) Book by ASHRAE, 2021 View all product details Most Recent Track It Language: Available Formats Options Availability Priced From ( in USD ) PDF Immediate download $69.00 Add to Cart Customers Who Bought This Also Bought F09 -- Thermal Comfort (I-P) Priced From $62.00 F15 -- Fenestration (I-P) The methodology was evaluated by using observations in various geographic regions, including coastal, mountain valley, mountain plateau, and major cities. NCDC. Solar irradiation of surfaces on clear days. Data presented in the 2021 edition of Standard 169 are compiled from the 2021 ASHRAE HandbookFundamentals, Chapter 14, "Climatic Design Information," and . ANSI/ASHRAE. Lott, J.N. I encourage every engineer to read the forthcoming Handbook chapter on climate change. (2004) varied somewhat among the locations analyzed, generally the longest cold-season episodes last days, whereas the longest warm-season episodes were always shorter than 24 h. These results were seen at almost all locations, and are general for the continental United States. Display frequency vectors and joint frequency matrices in the form of numerical tables. Environmental parameters for indoor agriculture, including controlling temperature, humidity, air movement, air quality will be covered. The difference between local and solar time can easily be 1 or 2 h, depending on site longitude and whether daylight saving time is in effect. Information on this product can be found at www.ncdc.noaa.gov/oa/documentlibrary/pdf/eis/clim20eis.pdf. Table 6 gives a normalized daily temperature profile in fractions of daily temperature range. Full Description. 1987. 2000. Interactive Sessions: Roundtable Discussions and Meet Ups. 2004) investigated the uncertainty associated with the climatic design conditions in the 2001 ASHRAE Handbook National solar radiation database, 1991-2010 update: Users manual. This volume is published, as a bound print volume and in electronic format as PDF and online, in two editions: one using inch- pound (I-P) units of measurement, the other using the International System of Units (SI). A Roundtable is hosted by a moderator on a certain topic of interest, generally inciting a more technical discussion. Wind engineering methods, as described in Chapter 24, can be used to account for exposure differences between airport and building sites. The measure of frequency is the average number of episodes per year or its reciprocal, the average period between episodes. ASHRAE CLIMATIC DESIGN CONDITIONS 2009/2013/2017/2021. The quality control of the integrated surface hourly database. . The nearest hour to the AST is 23, yielding a Table 6 profile value of 0.75. These extreme sequences are available on CD (ASHRAE 1997). Ryan MacGillvray ryan.macgillivray@dwel.com. Daily range values are MCDBR = 20.2F and MCWBR = 6.1F. Daylight saving time is in effect for Atlanta in July. Updated every four years, the chapter is updated with recent, reliable climate data to help building professionals size and design building components. Thus, because of short-term climatic variability, there is always some uncertainty in using design conditions from one period to represent another period. A web version of this product is now available free of charge from NCDC at www7.ncdc.noaa.gov/CDO/cdoselect.cmd?datasetabbv=SUMMARIES. Substituting these values into Equations (26), (27), (28), and (31) leads to. ASHRAE Research Project. 2015. 1963. ASHRAE Journal 41(3):31-38. 2001. Equation (32) then gives, For cooling degree-days, Zb = 0.651. The Meeting of the Members will also include special awards presentations for recipients of the prestigious Louise & Bill Holladay Distinguished Fellow Award and the Andrew T. Boggs Award. This course will not be recorded and archived for later viewing. Deriving Hourly Design-Day Temperatures. In these instances, it may be beneficial to obtain climate data using procedures developed by ASHRAE research project RP-1561 (Qiu et al. 1983-1987. ASHRAE Transactions 106(1). ISO. ASHRAE Research Project, Final Report. A link will be sent to the email address you used to register with the Friday before the live sessions begin (Friday, June 25). Typical HVAC calculations (e.g., hourly cooling loads) are performed in local time, reflecting building operation schedules. The role of climatological normals in a changing climate. Smith, A., N. Lott, and R. Vose. This change improved completeness and consistency of available data. Roundtables and Meet Ups are small group sessions hosted and moderated by Society grassroots committees and are meant to bring attendees together for an interactive discussion.
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